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- Joined
- 29 Jan 2007
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- 727
Best to check - AMD can limit overclocks in their official drivers via the vendor ID, so you would think it would be permitted.
Did some more research - the mem on these boards is rated at 1000Mhz (4000Mhz effective) and not the same as the 1200Mhz mem on the 5870. That means it's already overclocked on the Powercolor card.
After some strange crashing in 3Dmark03 (but not 05), I had to reduce my mem clocks down to 1150. Strange thing is I can run some things with it at 1300!!! But it's only 100% reliable at 1150.
Also after extensive testing I had to reduce my core down to 870!!! That's from 950 I initially had it set at! Meaker was right - these don't clock that well.
I've settled on 850/1100 - a little down on tested stable speeds of 870/1150 just to be sure. Also same core speed as the default clocks of 5870 and 4890 from last gen. The mem is running 100Mhz above its rated speed. Got my friends to the same - I thought mine was better but it was just inconsistent in how it crashed.
So, I'm not sure it is worth overclocking these anyway. Others seem to be getting higher - but have they tested thoroughly. I found the longer I tested, the more I had to come down! Perhaps they have better power delivery and voltages or something!
Did some more research - the mem on these boards is rated at 1000Mhz (4000Mhz effective) and not the same as the 1200Mhz mem on the 5870. That means it's already overclocked on the Powercolor card.
After some strange crashing in 3Dmark03 (but not 05), I had to reduce my mem clocks down to 1150. Strange thing is I can run some things with it at 1300!!! But it's only 100% reliable at 1150.
Also after extensive testing I had to reduce my core down to 870!!! That's from 950 I initially had it set at! Meaker was right - these don't clock that well.
I've settled on 850/1100 - a little down on tested stable speeds of 870/1150 just to be sure. Also same core speed as the default clocks of 5870 and 4890 from last gen. The mem is running 100Mhz above its rated speed. Got my friends to the same - I thought mine was better but it was just inconsistent in how it crashed.
So, I'm not sure it is worth overclocking these anyway. Others seem to be getting higher - but have they tested thoroughly. I found the longer I tested, the more I had to come down! Perhaps they have better power delivery and voltages or something!
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